package com.example.common.view.view

import android.content.Intent
import android.os.Bundle
import androidx.activity.result.contract.ActivityResultContracts
import androidx.databinding.ViewDataBinding
import com.example.base.view.BaseActivity
import com.example.common.view.event.CustomEvent
import org.greenrobot.eventbus.EventBus
import org.greenrobot.eventbus.Subscribe
import org.greenrobot.eventbus.ThreadMode


abstract class BaseMvvmActivity<VDB:ViewDataBinding>:BaseActivity<VDB>() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        //获取数据
        loadData()
        //订阅数据
        oserveDataChanged()
        //EventBus事件总线
        EventBus.getDefault().register(this)
    }
    //接收事件
    @Subscribe(threadMode = ThreadMode.MAIN)
    public fun onReceiveEvent(event:CustomEvent){
        //校验是否为当前页面接收的事件
        if (event != null && event.target == this.javaClass.simpleName){
            handEvent(event)
        }
    }

    override fun onDestroy() {
        super.onDestroy()
        //反注册，防止内存溢出
        EventBus.getDefault().unregister(this)
    }
    //交给子类处理事件
    protected open fun handEvent(event: CustomEvent){

    }
    /*************  使用AndroidX提供合约模式实现页面之间传值  ***************/
    //获取的启动器
    private val resultLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()){ result ->
        //成功返回（下一页使用setResult(Intent)）
        if (result.resultCode == RESULT_OK){
            result.data?.let {handActivityResult(it)}
        }
    }

    //启动下一个Activity并接收返回结果
    //Explain |Add comment
        protected open fun startNextActivityForResult(intent: Intent) {
        intent?.run {
            //相但于startAcitvity(this)
            resultLauncher.launch(this)
        }
    }
    //子类获取页面返回的Intent对象，并从中获取数据
    //Explain |Add comment
    protected open fun handActivityResult(data:Intent){}

    /*************  使用AndroidX提供合约模式实现页面之间传值  ***************/


    /*************  系统提供API实现页面之间传值  ***************/
    protected open fun startNextActivity(intent: Intent?){
       intent?.run {
           startActivity(this)  //AMS来控制
       }
    }
    protected open fun startNextActivityForResult(intent: Intent?,requestCode:Int){
        intent?.run {
            startActivityForResult(this,requestCode)//官方不推荐，后面项目不要使用
        }
    }

    override fun onActivityResult(
        requestCode: Int,
        resultCode: Int,
        data: Intent?,

    ) {
        super.onActivityResult(requestCode, resultCode, data)
        receiveNextForResult(requestCode, resultCode, data)
    }
    protected open fun receiveNextForResult(
        requestCode: Int, resultCode: Int, data: Intent?, ){

    }
    /*************  系统提供API实现页面之间传值  ***************/

    //可以根据业务需要重写方法
    protected open fun loadData(){

    }
    //可以根据业务需要重写方法
    protected open fun oserveDataChanged(){

    }
}